Wrench



` B. B. SANKEY.

BENCHi No. 595,252. Patented Dec. 7, 1897;

Inl/*ela 011' UNiTnD STATES PATENT OFFICE.

EBEN B. SANKEY, OF SALEM, MISSOURI.

WRENCH.

SPECIFCATION forming part of Letters Patent No. 595,252, dated December'7, 189'?. Application tiled March 29, 1897. Serial No. 629,790. (Nomodel.)

To @ZZ whom, 'it may concern.-

Be it known that I, EBEN B. SANKEY, a citizen of the United States, anda resident of Salem, Dent county, Missouri, have invented a certain newand useful Improvement in Vrenches, of which the following is a full,clear, and exact description, reference being made to the accompanyingdrawings, forming part of this specification.

My invention relates to that class of wrenches wherein the shank of eachjaw is provided with notches or serrations and one of the shanksprovided with means to tighten it upon the other shank when the wrenchhas been adjusted to suit the size of the nut to be turned.

Figure I is a side view of my improved wrench. Fig. Il is an enlargeddetail edge view. Fig. III is an enlarged detail side view illustratingthe manner of locking the two shanks together when the jaws have beenadjusted.

Referring to the drawings, l represents one of the jaws, and 2 the otherjaw, of the wrench. The jaw l has a shank 3 and the jaw 2 a shank 4:,the two shanks forming the handle of the wrench. Secured to or formedupon the shank 4e are straps 5, between which the shank 3 iits and movesas the wrench is adj usted.

rlhe shank 3 is provided with a long series of notches or serrations 6and the shank 4L with a short series of notches or serrations 7, thenotches being adapted to engage, as shown in Figs. I and III, to holdthe jaws from moving apart when the nut is being turned. The notches 7are made just back of the strap 5, so that while the lock or tight eningdevice exerts its force on the shank f-i close to the notches 7, yetthese notches are exposed and not interfered with by the straps 5, sothat they can be readily cleaned and can be sharpened if they becomebruised or dull.

8 represents a locking-block pivoted to the straps 5 by means of a pin9, that passes through the outer ends of the straps and through adiagonal slot l0 in the block S. The inner end of the block S iscircular, as shown at ll, while the outer end is provided with a head12, by which the block is manipulated. The slot lO extends in an outwarddirection away from the rounded end of the block, as shown in Fig. III.

Vhen the wrench is to be adjusted, the block S is pulled forward fromthe position shown in full lines, Fig. III, to the position shown indott-ed lines, and is then swung over from the position shown in fulllines, Fig. I, to the position shown in dotted lines, same figure, thuspermitting the notches (3 and 7 to be disengaged and the jaws of thewrench adj usted. NVhen the wrench has been adjusted, the block S isturned back to the position shown in full lines, Fig. I, and is thenforced toward the position shown in full lines, Fig. III, andthe pin 9,working in thediagonal slot l0, causes the block to act as a wedge indrawing the notches 7 into engagement with the notches 6 and thu'sfirmly hold ing the wrench to its adjustment. This manner of connectingthe block to the straps by a diagonal slot to receive the pincompensates for wear in the parts, for as the parts become worn thelocking-block is shoved farther in to compensate for the wear.

The wrench is simple and inexpensive to manufacture and can be quicklyadjusted and held to its adjustment. It is not always necessary tomanipulate the locking-block for light work; but the wrench may be heldwith the notches in engagement by pressing the shanks together with thehand that grasps the tool, and at such times the locking-block is not inthe way, but is simplyleft lying in the position shown in dotted lines,Fig. I.

I claim as my invention- In a wrench the combination of a jaw having-ashank 3 with a long series of serrations and a jaw having a shank a witha short series of serrations, straps 5, extending from the shank e, alockingblock journaled to the straps 5 by means of a pin fitting in adiag0- nal slot made in the block, substantially and for the purpose setforth.

EBEN B. SANKEY.

S. H. WARE, P. H. SANKEY,

